CAD classes are always helpful to teams. Also an application of CAD for those who already know it is an "intelligent design workshop" - generally a bunch of smart design tips and notes that many new designers may not normally know (when to use what piece/material, the limits of specific designs, etc). I run a similar workshop with my team in the fall, where after half a day of teaching about design, I give them a game I make up and tell them to CAD a robot to play the game. In 2 weeks the designs are due, and I email out an analysis of each design. It really helps the kids learn and understand as well as try out new ideas.